Plasma breast lumps are usually caused by plasma cell mastitis, generated about one week after the occurrence of inflammation, but the exact time of pus depends on the degree of the patient’s condition, some patients will be pus in 3 to 5 days, and some patients will not appear pus. Plasma cell mastitis is usually caused by nipple dysplasia and nipple inversion. In the early stage, it can be relieved by hot compresses, external application of mannite, diet control, avoiding spicy and irritating food, and some patients can still be relieved without pus. Plasma cell mastitis is aseptic inflammation caused by dilatation of the milk ducts, when localized inflammation occurs, an abscess will appear, and the whole process is about 3 to 5 days. If the abscess is not treated in time, it will break down on its own and nipple overflow will occur. When there is pus, the pus should be extracted out in time, and then anti-inflammatory treatment should be carried out. When a hard lump of pulp breast appears in the breast, consult a doctor in time and take relevant measures as early as possible under the doctor’s guidance to avoid delaying the condition.